Abstract
Summary
A study has been made of the response of the burro to 200 r fractional Co60 gamma ray whole body irradiation. The response is similar to but slower than that observed with a daily dose of 400 r. The response of the platelets to irradiation with 200 r daily corresponded most closely with that seen when an acute LD50 dose had been given and correlated with the bleeding tendency which developed on the ninth irradiation day. A significant hyperferremia was observed in the burro one hour after receiving a total dose of 600 r but the maximum response was not obtained until 1800 r had been administered. Most animals had significantly elevated plasma iron values prior to exitus.
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